The term Battery Monitoring (or Management) System is used in at least two different ways:

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The term Battery Monitoring (or Management) System is used in at least two different ways regarding [[electrical:​12v:​lifepo4_batteries_thread|LiFePO4]] battery banks:

- cell-level monitoring and cutoff for overvoltage or undervoltage;​ these are intended to maintain balance between cells of fast, high-current charging, as found in electric vehicles (EVs). ​

- cell-level monitoring and cutoff for overvoltage or undervoltage;​ these are intended to maintain balance between cells of fast, high-current charging, as found in electric vehicles (EVs). ​

- bank-level monitoring and High Voltage Disconnect and Low Voltage Disconnect.((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-103.html#​post1140470)) ​ In an an RV these would be acommplished by the charge controller and an LVD respectively. ​ This simple approach is advocated by T1 Terry, who believes the cell-level BMS is an unneeded expense for Fractional C charging and can do damage by poor design((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-130.html#​post1150118)) or failure.

- bank-level monitoring and High Voltage Disconnect and Low Voltage Disconnect.((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-103.html#​post1140470)) ​ In an an RV these would be acommplished by the charge controller and an LVD respectively. ​ This simple approach is advocated by T1 Terry, who believes the cell-level BMS is an unneeded expense for Fractional C charging and can do damage by poor design((http://​www.cruisersforum.com/​forums/​f14/​lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069-130.html#​post1150118)) or failure.